Classification and testing of surge protective devices 16. The present paper discusses a new method of dividing the wind turbine blades in different zones, to argue for a principle of differentiating the lightning protection system. The internal systems may be subjected to full or partial lightning surge currents. Nfpa 780 includes lightning protection for typical building construction in chapter four as requirements for ordinary structures. On the one hand, electrical and electronic components continue to get smaller. The atmosphere surrounding us is electrically charged, but free air maintains a. The basis of conventional lightning protection technology. The lightning protection institute is a nationwide notforprofit organization founded in 1955 to promote lightning protection education, awareness, and safety. For three decades, the lightning protection guide from dehn has been the trademark for practiceoriented technical literature in the fields of lightning and surge protection for buildings, installations and systems. The 780 document covers many specialty constructions from hazardous materials storage to boats and ships to. Bonding, grounding and surge protection by richard kithil, president and orlando alzamora, vicepresident national lightning safety institute nlsi 1. Missing page numbers correspond to the frenchlanguage pages. Dexmet is the exclusive supplier for boeing, principle supplier for embraer, and preferred vendor to a majority of aircraft manufactures around the world. It can serve as a useful guide to justify additional cost incurred by additioh.
S1 flashes to the structure s2 flashes near to the structure s3 flashes to the lines connected to the structure. The highest requirements are placed on the discharge capacity of lightning current arresters and combined arresters used at the transition from lightning protection zone 0 a to 1 or 0 a to 2. Microgrid precision expanded metal foils from dexmet are the materials of choice for lightning strike protection in composite aircraft structures. State of the art for the installation of lightning protection systems 0. Zone of protection is described in the lightning standards using a 150 feet 46.
Pdf lightning strikes to flammable materials in offshore oil installations ooi can. The lightning protection and ex zones are already harmonised at the design stage. Detailed information to determine zones of protection are found in lightning protection design standards. Sparisk is software for lightning risk assessment according to iec 62305. Technical advisor for uls lightning protection services member of nfpa 780 technical panel certification for residential building inspector to the international building code for single and multi family dwellings pending. Lightning protection of hazardous areas lightning protection of hazardous areas in line with atexiecex with hazardous areas at risk from the consequences of direct and indirect lightning, a comprehensive approach to lightning protection in line with bs eniec 62305 should be considered. Bs eniec 62305 lightning protection general standard principles. Rohit narayan, be electrical, mba tech mgmt, mieaust background the current standard for lightning protection in australia and new zealand is asnzs 1768. Defining the lightning protection zones outer zones. No longer is it acceptable for the professional team to ask in their tender speci. Lightning protection zone how is lightning protection zone.
A practical guide to lightning protection in australia and new zealand author. Surge protection has become an area of increasing significance. The lpz have the function of reducing to predefined values the influence of electromagnetic fields and interference on the electric lines. Installations not directly related to those areas and structures housing such installations can be protected against lightning by the provisions of this standard. Chapter 2 lightning protection design, engineering, acquisition, installation, and. Lightning protection overview lightning protection institute. Based on this, individual lightning protection zones can be set up according to. Only an entire system can provide effective protection for all areas of power, signals and data and we offer an ideal form of surge protection for all these applications fields.
Separately mounted protection system overhead ground wire protection lightning protection for structures containing hazardous materials. Lightning and surge protection for explosive atmospheres ee. Surge protective devices are categorised as lightning current arresters, surge arresters and combined arresters. A practical guide to lightning protection and australia and nz. Lightning protection zone concept dehn international. All lightning protection connections will be free of paint and galvanizing. The program allows the user to assess risk of structures including several zones and entering lines. Lightning protection according to iec 62305 diogo filipe da silva santos thesis to obtain the master of science degree in. Pdf since lightning has no specific path to reach the ground, it may choose to utilize any.
The book had to be revised and enlarged due to changes in standardisation and technical progress. International iec standard 623052 first edition 200601 protection against lightning part 2. The recommendations specifically cover the following applications. Installation of lightning protection systems protection for ordinary structures practices for lightning protection zones of protection rolling sphere model. Jun 21, 2019 bs 6651 lightning protection pdf lightning protection bs download as pdf file. Lightning protection for facility operational continuity requires attention to combinations of defenses. Lightning protection guide 3rd updated edition dehn africa. Lpi is dedicated to ensuring that todays lightning protection systems provide the. Risk management this englishlanguage version is derived from the original bilingual publication by leaving out all frenchlanguage pages.
Lightning protection consultant handbook erico is dedicated to providing a costeffective lightning protection solution for any given application. Australiannew zealand standard lightning protection section 1 scope and general 1. Nfpa 780 and ul 96a are application standards governing satisfactory installation of an lps. The standards in the united states for lightning protection systems are the national electrical code nec, the national fire protection association 78, lightning protection code nfpa 78, and underwriters laboratories 96a, standard for installation requirements for lightning protection systems, ul 96a. Note especially the intersystem bonding terminal and surge protective device spd. Erico manufactures, using the eritech trade name, lightning protection systems in full accordance with more than twelve national and international. Lightning strokeslightning strokes at i llihtia typical lightning lightning stroke shape stroke can last for over one second gg p over one second and consist of many strokes discharges, sometimes over ten, each with aneach with an arcchannel current of between 2ka and 200ka 1% of200ka 1% of strokes exceed 200ka. If they do not already exist, they must be added at the time of lightning rod installation. This ac presents a method of showing compliance with far 29. For a finite period, bs eniec 62305 and bs 6651 ran in parallel, but as of august 2008, bs 6651 has been withdrawn and now bs eniec 63205 is the.
Lightning protection zone concept dehn united kingdom. Standard for the installation of lightning protection systems 2017 datascience. Damage and loss iecbs en 62305 identifies four main sources of damage. The lightning protection industry began in the united states when benjamin franklin postulated that lightning was electricity, and a metal rod could be used to carry the lightning. Helpful calculation tools for determining a zone of protection are provided. Standard for the installation of lightning protection. The bs eniec 62305 standard for lightning protection was originally. Lightning protection initially as part of an nfpa task force, since disbanded assembled for the purpose of responding to the nfpa standards committee decision 0030, specifically the request for technical substantiation of the lightning protection techniques and practice contained in modern lightning protection standards. Pdf since lightning has no specific path to reach the ground, it may.
Once a lightning protection level has been selected, this fixes many of the parameters for the design and installation of the system. According to this principle, the structure to be protected must be subdivided into inner lightning protection zones with different lemp threat values. Definition of lightning protection zones lpz 0 a zone where the threat is due to the direct lightning flash and a the full lightning electromagnetic field. To the right are electric power service components which are essential to lightning protection. Air rods or finials whether they are free standing masts or linked. Now the third revised edition of the english lightning protection guide is available. Lpz 0 zone where the threat is due to the unattenuated lightning electro magnetic field and where the internal systems may be subjected to full or partial lightning surge current. Ul 96 and ul 467 are product standards for lightning protection components. This means that the requirements for the use of surge protective devices both in hazardous areas and at the boundaries of lightning protection zones must be fulfilled. A corrosionfree earth connection can be easily established by fixed earthing. A lightning protection zone concept in conformity with the iec 623054 standard provides effective protection against surges caused by a lightning electromagnetic impulse lemp.
The paper presents analysis of lightning protection zones of railway traction construction on example of polish dc 3 kv railway in the case of traction wires net with the individual and the group. Design calculations of lightning protection systems part one in article design process for lightning protection systems, i indicated that the design process for lightning protection systems is commonly broken into discrete phases, allowing the lightning protection designer to present an integrated design package. Those definitions add clarity to the terms as used in the standard. Design calculations of lightning protection systems part. All relevant devices, installations and systems must be reliably protected to an economically reasonable extent. For example, the size of the rolling sphere for calculating protection zones is 20 m for a protection level of i, and increases to 60 m for level iv. The definition of lightning protection zones lpz must be done according to the in accordance with iec 623054. Pdf a technical basis for guidance of lightning protection for.
Fundamentals of lightning protection systems, edition 1c. Lightning protection of iecex hazardous areas to atexiecex. Prior to this was bs cp326, first published in 1965. Pdf lightning protection zones created by traction.
The equilization bonding conductor is part of the lightning protection system. Nfpa 780 provides lightning protection system installation requirements to safeguard people and property from fire risk and related hazards associated with lightning exposure. Information from omega red on british standards relating to. Trabtech surge protection user manual for specialist electrical planners. Model often used to determine the protection zone of lightning rods. It is the design and placement of the lps that ensures the structure and internal contents are within an lpz 0b zone. Protection against lightning a uk guide to the practical. Requirements for lightning protection systems, or nfpa 780, standard for the installation of.
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